Septic tank



Nov. 23 1926 L.. G. sRr-:sovlcH E1- AL 1608441 SEPTIC TANK Original Filed Jan. 14, 1924 3 sheets-sheet 1 ITNESSES INVENTOR 574e@ O/cz mw A TTOR NE YS Nov. 23 1926. 1,608,441

L.. G. sREsovlcH ET AL sEPTIG TANK oi-iginn Filed Jan, 14, 1924 3 Sheets-Sheet 2 I r l f HH 11.-] [i 10-i I 1 f .1! i! 1 I will@ 21 r ATTORNEYS.

Nov. 23 1926. 1,608,441 L. G. sREsovlcH en' AL SEPTIG TANK- briginal Filed Jan. 14. 1924 3 Sheets-Sheet 5 A TTORNE YS Patented Nov. 23, 1926.

'UNITEQ STATES PATENT QFFICE.

LUKE GEORGE SRESOVICH AND CHARLES FREIJERICK RANDAL COATES, OF MAM, FLORIDA, ASSIGNORS TO INTERLOX TANK COMPANY, A CORPORATION.

SEPTIC TANK.

Application filed January 14, 1924, Serial No. 686,198. Renewed September 10, 1926.

Gui invention relates to improvements in septic tanks and it consists of the constructions, combinations and arrangements herein described and claimed.

An object ot' the invention is to provide a septic tank which may be used either singly or in a combination ot' tanks for the purpose of receiving and storing sewage, particular use oi the invention being made in communities where. no sewerage system is available.

Another object of the invention is to provide a septic tank which has such an arrangement of key grooves to be Iilled with cement or other plastic material when two or more of the tanks are used in combination, to thereby hold the tanks together so that there may be no relative settling and consequent leakage from the joints.

Another object of the invention is to provide a septic tank having lateral enlarge ments which are respectively provided with concavities and convexities adapted to fit similar formations on other tanks when a number of tanks are used in combination.

@ther objects and advantages will appear from the following specification, reference being had to the accompanying drawings, in which,

Figure l is a longitudinal section showing two of the improved septic tanks xed in combination,

Figure 2 is a plan view,

Figure 3 is a detail perspective view of the septic tank,

Figure 4 is a vertical section of a septic tank illustrating a modification in the form oi battles,

Figure 5 is a plan view of the parts shown in Figure Il,

Figure 6 is a perspective view of the tank in Figures 4 and 5.

As may he gathered from the foregoing briei2 statement of the objects ot the inven tion, the septic tank is used primarily in 4communities where the facilities of a sewerage system are not available. The scope ot use of the septic tank is not limited to connection with small dwellings because by properly designing the tanks and setting them in combinations or batteries, large hotels, apartment houses, industrial plants, et cetera, may he accommodated.

Reference is iirst made. to Figure 3 which shows one of the tanks in detail. The tank l is made of any suitable material, concrete being one ot the popular materials in that it readily lends itseltl to casting. Lateral enlargements or lugs 2 and 3 provide foundations upon the respective ones of which concavities 4 and convexities 5 respectively are formed.

These concavities and conveXities are inter-engagcable when two or more of the septic tanks are set together in combination as shown in Figure l. The concavities and convexities are shown arranged in series ot three extending crosswise of the enlarge ments. Obviously more of each may be employed should it be found necessary or dcsirable.

Formed in the enlargements 2 and 3 are passages 6 and 7 (Figure l) which communicate with the interior ot the tanks at a place approximately midway of its height, and extend upward at a decided angle after which they merge with inlet and outlet openings 8 and 9 respectively. These openings originate in the central concavity Ll and convexity 5 respectively. The inlet opening 8 extends through a collar l0 which is either cast as an integral part of the enlargement 2, or may be set in as a separate part. This collar is surrounded by a groove l1 which extends upward to the top of the enlarge-l ment 2. A similar groove l2 in the complementary enlargement 3 of a tank next adjacent when two or more tanks are used in combination) is intended toreceive the collar 10 as clearly shown in Figure l.

Cement or other material 13 is poured into the chamber formed by the complementary grooves 11. and l2 which, upon hardening` forms an adequate bond at the joint around the collar 10. The respective enlargements 2 and 3 have key grooves 14: and 15 which` like the grooves ll and l2, are intended to register when two or more tanks are placed together, so that cement or other plastic material may be poured in as in the instance already cited. This cement upon hardening provides a key or bond which not only holds the tanks close together but also prevents one from settling in respect to the other. All of the various grooves, passages, et cetera, occur in the enlargements 2 and 3 which supply the necessary strength and rigidity required.

Attention is directed to Figure l. One or the other ol the two tanks may be regarded IUI) the rezeiving or sludge tank. The sewage is discharged into this tank, say for example, the tank 1 at the left, which, upon gradual filling, will ultimately discharge some of its contents into the adjacent tank through the communicating passages 7 and 6. As already stated, these passages are inclined at a decided angle. The intervening wall aresented by the enlargements 2 and 3 constitute an invisible baflle, which prevents an undesirable. splashing of the contents of the first tank into the second.

Arranged immediately above each of the passages 6 and 7 and on a level with the tops of the openings 8 and 9 are vent openings 16 and 17. rthese are for the purpose of permitting a circulation of gas from one tank to the other. he top of each tank is countersunk at 18, so that a cover 19 may be normally seated upon the tank to prevent the entrance of dirt and to make it air tight when the tank is buried. y

lt is to be further observed that the corners of the tank are rounded at 20. This gives each shell or tank a bowl-shaped bottom, preventing the collection and clogging of solid material in corners.

The modification in Figures Ll, and 6 differs from the foregoing form of the invention principally in the arrangement of the beides. in this instance the baffles are cast interiorly of the tank 12L in the shape of opstanding culverts 21 which normally are open at both ends (Figure 4;). The lower ends of these baffles end approximately midway of the height of the tank. The upper ends are closed by the cover 19"L when the latter is in place. This cover is seated in the circular groove 18a at the top and if desired the joint between the cover and the tank may be sealed with a suitable material in both forms 0f the invention. The culverts or baffies are in direct line with enlargements (like the enlargements 2 and 3) on the exterior of the tank. o

Openings 8a and 9a communicate with the passages formed by the baffles 21. The opening 8a passes through a collarl()CL which, like the collar 10 in Figure 1, is situated in a vertical groove 111, in turn formed in one of several concavities lik The outermost concavities have key grooves 111a which are adapted to receive a sealing medium when two or more tanks are set together.

The opposite side of the tank 1a has an enlargement 3a, like the enlargement 2a, provided with convexities 5a. The central convexity has a groove 12, and the outermost conveXities have key grooves 15a. rl`he ob- Iiect of all these is undoubtedly fully apparent and the description thereof w'll not have to be repeated. The tank 1a. as in Figure 1, has fully rounded corners 2Oa at the bottom so that no material may find lodgement.

There are yseveral outstanding features of importance in the improved septic tank; 1, the convex and concave ahutments of the lateral enlargements 2 and 8 by means of which adequate and tight connection between tanks may be made; 2, the male and female connections 10 and 12 (Figure 1) 8, the bowl shape of the bottom 20, and, 4:, the countersunk top 18 which provides a seat for the cover 19. Another feature of advantage lies in the fact that the septic tanks are made in solid units, thereby permitting any inexperienced person to fully install a perfect sanitary sewerage disposal system.

While the construction and arangement of the improved septic tank herein described and claimed is that of a generally preferred form, obviously modifications and changes may be made without departing from the spirit of the invention or the scope of the claims.

Ne claim z# 1. A septic tank having diametrie reinforcing enlargements respectively provided with concavities and convexities on abuttable surfaces, certain ones of the convexities and concavities havino' keyY grooves others having plain grooves, and a collar extending from one of the plain grooves said collar and the complementary groove on the opposite side having openings extending to the interior of the tank.

2. A septic tank having diainetric external enlargements arranged to be abutted when two or more tanks are fitted together, theV abutting surfaces of said enlargements having a plurality of concavities and conveXities ruiming lengthwise thereof, the central ones of each having grooves extending part of the length and others of each having full length key grooves, and collar extending from one of the central grooves to fit into the complementary groove of another tank when placed thereagainst, said collar and complementary groove providing a male and female connection between tanks and having openings extending to the interior of the tanks.

3. A septic tank having diainetric external enlargements arranged to be abutted when two or more tanks are fitted together, the abutting surfaces of said enlargements having a plurality of concavities and conveXities running lengthwise thereof, the central ones of each having grooves extending part of the length and others ofV each having full length key grooves, a collar eX- tending from one of the central grooves to fit into the complementary groove of another tank when placed thereagainst, said collar and complementary groove providing a male and female connection between tanks and having openings extending to the interior of the tanks, and means including passages in said enlargements with which said openings merge on the interior of the tanks de Leona-4i lining walls acting as bal'lles in respect to fluid entering said passages.

d. A septic tank having arially alining inletand outlet openings incorporated in the walls thereol each merging with passages ei;- tending in diilerent directions but toward the bottom ot the tank the inclined contronting walls ot said passages delining a baille arrangement, the bottom corner ol' the .interior ot' the tank being fully rounded into a bowl-shape to prevent the accumulation of substance discharged 'trom said battles.

5. A septic tank having diametric, axially alining inlet and outlet openings disposed substantially horizontally and merging with downwardly inclined pa disclnirging toward the bottom ot the tank the inclined coni-fronting walls oit said passages providing battles, and a collar built at the mouth of one ot said openings being adapted to tit in a depression at the mouth oit the opening ot a complementary tank when two or more tanks are set together.

6. A unitary septic tanlr having an internally countersunk top, a pair ot lateral external enlargements extending 'tall length ot the tank the respective enlargements'having Ya series of :tull length concavities and conveXities along the abuttable surfaces the outermost ones of each having full length key grooves, the central oneV oi each having a shallow groove with which inwardly directed openings and passages in said enlarge ments communicate, a collar situated in one ot said grooves through which one ot the openings passes, and a cover for the tank to occupy the countersunk top.

7. A septic tank having diametrically `opposite relatively thick` external abuttable enlargements, there being axially alined inlet and outlet openings merging with acutely downwardly inclined passages in each ol said thick enlargements, those portions ot said enlargements in trent otl the passages constituting battles, the root ot each opening having merging therewith an inwardly directed vent passage which is situated in each of said battles. V

8. Apparatus ot the character' ydescribed comprising a plurality of chambers, each having specially prepared abuttable surfaces provided with vertically disposed registering grooves, a plastic bond filling the grooves thereby preventing lateral displacement ot the chambers with respect to each other, means protruding 'from each ot' the abuttable surfaces entering the abuttable surface ot a complementary chamber, and a plastic bond lilled in around said last means both to seal the joints and prevent axial displacf-nnent ot the chambers` 9. Apparatus oi the character described comprising a plurality olf chambers. each having abuttable surfaces provided with vertically disposed registering grooves, a

the top ot the chamber, and a plastic bond filling said last grooves both toseal the joints and prevent axial displacement ot Athe chambers.

10. Apparatus or the character described comprising a plurality ot chan'ibers having relatively thin walls, means furnishing communication between trie chambers. and relatively heavy ubutinen'ts iforined on the out-- side oit the wall ot each chamber, the abuttable surfaces of said abutments being so shaped that complementary abutincnts will interengage, such interengagement alone preventing lateral displacement ol' the chambers and said means of communication when connected in series.

ll. Apparatus ot the character described comprising a plurality ot chambers each having relatively thin walls, means furnishing communication between the chambers, a plurality ot relatively heavy and thick abutments on the outside ot the wall ot each chamber, the abuttable surfaces of said abutments having such shape, including scallops, which when interengag'cd upon connecting a plurality oit the chambers in series will alone prevent lateral displacement and disruption of said means ot communication, said abutments having registerable grooves enlarging toward the interior to provide keys, and a plastic material filling said grooves to constitute a bond and augment the aforesaid provision against lateral displacement. Y

l2. A septic tank unit including a bottom and an annular wall integral with the bottom and forming a tank complete in itself and provided at opposite sides with connecting elements, the connecting element at either side being constructed to abut against and be fastened to a connecting element of a similar unit, and a port in each connecting element arranged to torni a passageway with. the port of a similar unit when two of such units are placed in abutting relation with either connecting element ot one of the units secured to either connecting elements oi" the other unit.

13. A septic tank unit formed ot molded aterial and including a substantially tubular body portion lnrving1 a closed bot-tom provided with a substantially semi-spherical inner surface, lugs provided upon opposite sides ot said body portion, said lugs having substantially vertical and substantially horizontal key-ways adapted to receive grouting employed in connecting a plurality of said units together7 inlet and outlet ports extending through said lugs, and a pipe provided upon one of said lugs and adapted to pro ject into one of the ports ot a similar unit.

14. A septic tank unit including a bottoin and an annular Wall integral With the bottorn and forming a tank complete in itself and provided at one side With a convex sur- Jface and at its opposite side With a coneav-ed Y Surface orined to nest within the converted surface of a similar unit, and key-Ways in said surfaces exten-ding in diverse directions. p

15. A septic tank unit including a bodjT provided with a highaving` a convexed surface, a second lug` upon the body having` a conoaved surface adapted to snuglg7 engage the convened .surface ot' a lug:` on a similar tank body, and substantially vertical and sulostantie1157 horizontal parallel key-Ways in said surfaces for receiving grouting running in one direction along said lugs, and another forni of key-Way in sai-d surfaees running ina direction other than that'ot the first key-Ways.

16. A septic tank unit including a bottoni and an inte-gral annular Wall, said Wall being provided at one side with a projecting` lug having key-Ways merging into its outer surface, a second lug projecting outwardly froin the lopposite side of the Wall being provided With key-Ways merging` with the surface` aligned ports extending through opposite sides of the Wall through said lugs, said key-vvays surrounding the ports to permit sealing` the ports when lugs of two similar units are placed together and grouting is inserted in the key Walvs.

LUKE GEURGE SRESOVICH. CHARLES FREDERICK RANDAL COATES. 

